Their actions are contrary to the government directives measures meant to contain the Covid-19 pandemic.
Bars and social gatherings are among services that are still prohibited as one of the measures to prevent the spread of Covid-19.
Police and local authorities found the group at about 8pm drinking in the bar belonging to one Wellars Urayeneza, 47, located in Ngoma Village, Ngoma Cell of Ngoma Sector.
The Mayor of Huye District, Ange Sebutege warned residents against such violations.
He observed that Covid-19 cases are still high in the Southern region, which should be a concern by everyone to heed the government safety guidelines.
The Southern region Police spokesperson Superintendent of Police (SP) Theobald Kanamugire said that the violators were arrested following a tip-off by concerned area residents.
"Police received calls from some area residents that there are people drinking in the bar of Urayeneza. We conducted an operation and found 27 people inside drinking and they had no masks, neither did the bar have hand washing facilities. They were also close to each other and it was time when everyone should be home," said SP Kanamugire.
The curfew starts at 8pm in Huye District.
He warned against such behaviours and practices, which can lead to further spread of Covid-19.